er·y·thrite \ˈerəˌthrīt, ə̇ˈriˌth-\noun (-s) Etymology:erythr- + -ite 1.: erythritol 2.: a mineral Co3(AsO4)2.8H2O consisting of a hydrous cobalt arsenate, occurring in monoclinic crystals isomorphous with annabergite and also in globular and reniform masses and in earthy form, and being usually rose red